A special corrosion inhibitor for pyrolysis coking wastewater flue gas using converter high temperature flue gas

Abstract

The invention relates to a special corrosion inhibitor for pyrolyzing and coking waste water flue gas by using high-temperature flue gas of a converter, and an application method of the special corrosion inhibitor. Chemical formulation range of catalyst is as followings in percent by weight: 1.0 to 8.0 percent of rosin imidazoline quaternary ammonium salt, 35.0 to 55.0 percent of oleinic acid imidazoline, 8.0 to 17.0 percent of alkylphenol polyoxyethylene, and 20.0 to 50.0 percent of ethylene-glycol, adding a certain quantity of ethylene-glycol after content weighing sequentially, fully resolving and stirring uniformly once a material is added and then adding next material, and stirring uniformly. The formula of the catalyst is simple, the effect is obvious, the cost is low, the application method is simple, the special corrosion inhibitor and the method are suitable for pyrolyzing and coking waste water by using high-temperature flue gas of converter, and the corrosion inhibitor can be effectively used for refraining and coking flue gas formed after pyrolyzing of waste water in high-temperature flue gas of the converter or corrosion to pipeline and equipment from converter gas.

Description

Technical field: [0001] The invention relates to a special corrosion inhibitor for pyrolyzing coking wastewater by using converter high-temperature flue gas, and belongs to the technical field of iron and steel metallurgy and chemical industry. Background technique: [0002] In the converter dedusting system, after the flue gas passes through the heat exchange boiler in the flue system, the temperature of the flue gas is 850 ° C ~ 1000 ° C. A large amount of water is sprayed into this position to evaporate and cool the flue gas to cool the flue gas. To about 200 ℃, this process not only conducts dust electrification conditioning treatment on the flue gas, but also performs coarse dust removal, but the cooling process causes a large amount of sensible heat loss of the flue gas and consumes a large amount of water resources. The water consumption is about 0.1 m3 / ton of steel. [0003] It is difficult to meet the emission targets of coking wastewater through biochemical treatm...

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Problems solved by technology

[0006] However, none of the corrosion inhibitors in the prior art can be directly applied to the corrosion inhibition of converter high-temperature flue gas pyrolysis coking wastewater. Through domestic and foreign searches, no reports have been found on the use of converter high-temperature flue gas pyrolysis coking wastewater special corrosion inhibitors